Blue John and Childrenite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Soluble
Durability
Not Available
Not Available
Specific Gravity
3.00-3.25
3.06-3.25
Fracture
Not Available
Sub-Conchoidal, ConchoidalArthur Thomas, Conchoidal, Uneven
Cleavage
Not Available
Poor/indistinct on {100}
Mohs Hardness
Not Available
4.5-5
Chemical Composition
CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
(Fe,Mn)AlPO 4(OH) 2 -H 2OArthur Thomas , Gemstones (2009)
Blue John and Childrenite Chemical Formula
While comparing Blue John and Childrenite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Blue John and Childrenite chemical formula.
- Chemical formula of Blue John- CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Childrenite- (Fe,Mn)AlPO 4(OH) 2 -H 2OArthur Thomas , Gemstones (2009)
Blue John and Childrenite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Blue John and Childrenite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Blue John and Childrenite Optical Properties during the identification of gemstone. Specific gravity of Blue John is 3.06-3.25 whereas that of Childrenite is 3.06-3.25.